If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is

Options

A. autosomal dominant
B. autosomal recessive
C. sex-linked dominant
D. sex-linked recessive

Answer

D

Explanation

Most sex-linked (X-linked) conditions are recessive. This means that in a person with two X-chromosomes (females), both copies of a gene (i.e., one each X-chromosome), must have a change or mutation wherease in a person with one X-chromosomes (males), only one copy of a gene must havea mutation.
A femele with a mutation in one copy of a gene on the X-chromosome is said to be a 'carrier' for an X-linked condition.

For X-linked recssive disordes, an unaffected carrier mothe who has a mutatin in a goen on the X-chromosome can transmit either the X-chromosome can transmit either the X-chromosome with this multion or a normal X-chromosome to her chidren.
Autosomal dominat inhetitance refers to the pattern of inheritance of a condition directly or indirectly due to a recessive faulty gene copy on autosome.
Sex-linked dominant is a rare trait that is caused by a single abnormal gene on the X-chromosome.